Life is a waste of time, so let's skip the philosophy.
It is a hypothesis based on strange behavior and inspired by what I read in the book of Willy Voet. The Google search results are indeed only verification, and yes, it is always possible to eat gummy bears for the sugar intake or because you like it. The quantity and the manner in which ... still look suspicious.
Of course Haribo won't make masking agents, but if sportsmen use gum for testosterone and caffeine, they might as well use it for masking agents. If you look around you will find that gum takes up spirits like vodka, and it's even water-soluble, so hence why I said it can absorb whatever you want. The idea of using a binding agent may be something to look at too. Sagan is the best rider of the last couple of years, and he eats most gummy bears, so there is a correlation. It does sound silly and it may be non-causal, but every suggestion of doping practices sounds laughable until proven true, so don't judge too soon.
(edited for grammar mistakes)